Improved tuyere



waited mes @am can.

JOSEPH KAY', OE NEW HAVEN, CONNECTICUT.

Letters 'Patent No. 91,137, dated June 8, 1869.

IMPROVE!) TUYERE.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom 'it Iu1/y concern:

ont, have invented a new Improvement in Tuyere;

and I do hereby declare `the following, when taken in connection with the accompanying drawings, and the letters of reference marked thereon, to be a full, clear,

and exact description of the same, and which said drawings constitute part ofthisspeciiicaton, and .represent in Figure 1, a top view;

Figure 2, a side view;`

Figure 3, a transverse section; `and in Figure 4, ax diagram, illustrating the operation.

This invention relates to an improvement in .tuyeres `for forge-fires, and consists, first, in the arrangement of a swinging grate, combined with a slide, so as to `admit wind from beneath the ire; and, secondly, in

the arrangement of two slides, the one operating upon the other, so as to open the passageto the tuyere centrally, and to an extent double the movement of either slide.

In order to the clear understanding of my invention, I will fully describe thevsame, as illustrated `in the ac- V. companying drawings.

A is the tuyere-plate, into which a circular grate, B, is pivoted at a, so that the grate may be turned,

as occasion may require, to the' position in iig. 3, it

being held in position by a rod, 0, working through the tuyere-plate, as denoted in g. 1.

Beneath the grate is arranged the chamber D, into y which air is admitted directly from the blower.

Between the air-chamber and grate, I arrangetwo slides, b and c, to each of which a rack, E and F, re-

spective-ly, is fixed, and between the two racks is arranged a pinion, G, so that by moving one of theslides, the pinion G is turned, causing the movement of the-other slide in the opposite direction.

Through the two slides is formed .a circular opening, of the same diameter, or nearly so, as the grate-opening, thel openings being represented in iig. 4, the upper plate in red and the under plate in blue, and repv resented as closed; also so represented in g. 1.

' Now, if one, say the upper plate, be drawn out, as from-the position in "fig, 2, to that in fig. 3, then the .openings through the two plates come directly one over the other, and so as to open to the fullest extent the communication between-the air-chamber D and the grate, and in this movement the opening commences at the centre, each slide opening om the centre.

The space opened is double the movement of either slide, and when but a small space is required to be opened, as denoted by the broken black lines, iig. 4, then wind'is admitted centrally on to the grate, which, as will be readily seen, must have a better eiect upon the fire than if opened upon one side or edge of the Having fully described my invention,

What I claim as new and useful, and desire to secure by Letters Patent, is-

The arrangement, in the tuyere-plate A, of the swinging plate B, combined with the two plates, b and c, each constructed with corresponding openings, and so as to operate substantially in the manner herein' described.

JOSEPH KAY.

Witnesses:

J Olm H. SnUMwAY, A. J. TrBBITs. 

